Solve for x
x=z+30
Solve for y
y\in \mathrm{R}
x=z+30
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x+y-\left(y+z\right)=30
Multiply both sides of the equation by 2.
x+y-y-z=30
To find the opposite of y+z, find the opposite of each term.
x-z=30
Combine y and -y to get 0.
x=30+z
Add z to both sides.
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